diff --git a/lib/hexo/index.js b/lib/hexo/index.js
index 2a970b3a3f..f4c30c3afe 100644
--- a/lib/hexo/index.js
+++ b/lib/hexo/index.js
@@ -89,8 +89,8 @@ function Hexo(base, args) {
     path: pathFn.join(base, 'db.json')
   });
 
-this.config_path = args.config ? mcp(base, args.config)
-    : pathFn.join(base, '_config.yml');
+  this.config_path = args.config ? mcp(base, args.config) :
+    pathFn.join(base, '_config.yml');
 
   registerModels(this);
 
@@ -224,8 +224,8 @@ Hexo.prototype.loadPlugin = function(path, callback) {
     require.extensions = Module._extensions;
     require.cache = Module._cache;
 
-    script = '(function(exports, require, module, __filename, __dirname, hexo){'
-      + script + '});';
+    script = '(function(exports, require, module, __filename, __dirname, hexo){' +
+      script + '});';
 
     var fn = vm.runInThisContext(script, path);
 
diff --git a/lib/hexo/multi_config_path.js b/lib/hexo/multi_config_path.js
index 6245752bcb..cea53a7862 100644
--- a/lib/hexo/multi_config_path.js
+++ b/lib/hexo/multi_config_path.js
@@ -53,8 +53,8 @@ module.exports = function(ctx) {
         deepAssign(combinedConfig, yml.safeLoad(file, {json: true}));
         count++;
       } else {
-        log.w('Config file ' + paths[i]
-                                  + ' not supported type.');
+        log.w('Config file ' + paths[i] +
+                                  ' not supported type.');
       }
     }
 
diff --git a/lib/plugins/helper/paginator.js b/lib/plugins/helper/paginator.js
index 8979666bd2..689ba8d95a 100644
--- a/lib/plugins/helper/paginator.js
+++ b/lib/plugins/helper/paginator.js
@@ -20,18 +20,18 @@ function paginatorHelper(options) {
 
   if (!current) return '';
 
-  var currentPage = '<span class="page-number current">'
-    + (transform ? transform(current) : current)
-    + '</span>';
+  var currentPage = '<span class="page-number current">' +
+    (transform ? transform(current) : current) +
+    '</span>';
 
   function link(i) {
     return self.url_for(i === 1 ? base : base + format.replace('%d', i));
   }
 
   function pageLink(i) {
-    return '<a class="page-number" href="' + link(i) + '">'
-      + (transform ? transform(i) : i)
-      + '</a>';
+    return '<a class="page-number" href="' + link(i) + '">' +
+      (transform ? transform(i) : i) +
+      '</a>';
   }
 
   // Display the link to the previous page
diff --git a/lib/plugins/helper/search_form.js b/lib/plugins/helper/search_form.js
index 854dd15dd4..941db0ed09 100644
--- a/lib/plugins/helper/search_form.js
+++ b/lib/plugins/helper/search_form.js
@@ -8,11 +8,11 @@ function searchFormHelper(options) {
   var text = options.hasOwnProperty('text') ? options.text : 'Search';
   var button = options.button;
 
-  return '<form action="//google.com/search" method="get" accept-charset="UTF-8" class="' + className + '">'
-    + '<input type="search" name="q" class="' + className + '-input"' + (text ? ' placeholder="' + text + '"' : '') + '>'
-    + (button ? '<button type="submit" class="' + className + '-submit">' + (typeof button === 'string' ? button : text) + '</button>' : '')
-    + '<input type="hidden" name="sitesearch" value="' + config.url + '">'
-    + '</form>';
+  return '<form action="//google.com/search" method="get" accept-charset="UTF-8" class="' + className + '">' +
+    '<input type="search" name="q" class="' + className + '-input"' + (text ? ' placeholder="' + text + '"' : '') + '>' +
+    (button ? '<button type="submit" class="' + className + '-submit">' + (typeof button === 'string' ? button : text) + '</button>' : '') +
+    '<input type="hidden" name="sitesearch" value="' + config.url + '">' +
+    '</form>';
 }
 
 module.exports = searchFormHelper;
diff --git a/lib/plugins/helper/tagcloud.js b/lib/plugins/helper/tagcloud.js
index 3c328c8712..10a35b3022 100644
--- a/lib/plugins/helper/tagcloud.js
+++ b/lib/plugins/helper/tagcloud.js
@@ -224,9 +224,9 @@ function tagcloudHelper(tags, options) {
     }
 
     result.push(
-      '<a href="' + self.url_for(tag.path) + '" style="' + style + '">'
-      + (transform ? transform(tag.name) : tag.name)
-      + '</a>'
+      '<a href="' + self.url_for(tag.path) + '" style="' + style + '">' +
+      (transform ? transform(tag.name) : tag.name) +
+      '</a>'
     );
   });
 
@@ -245,10 +245,10 @@ function Color(color) {
     throw new TypeError('color is required!');
   }
 
-  if (this.r < 0 || this.r > 255
-      || this.g < 0 || this.g > 255
-      || this.b < 0 || this.b > 255
-      || this.a < 0 || this.a > 1) {
+  if (this.r < 0 || this.r > 255 ||
+      this.g < 0 || this.g > 255 ||
+      this.b < 0 || this.b > 255 ||
+      this.a < 0 || this.a > 1) {
     throw new Error(color + ' is invalid.');
   }
 }